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Bronchitis and normal condition in tertiary bronchus

Bronchitis is an inflammation of the air passages in the lungs. The condition occurs over a long period and recurs over several years. Symptoms include excessive bronchial mucus with a cough producing sputum. Cigarette smoking (active and passive exposure) is the chief cause of this disease, with air pollution, infection, familial factors, and allergies as exacerbating factors.

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